X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=drivers%2Fwatchdog%2Fmpc8xx_wdt.c;h=c24c2a9da6dcc674076ac36cfd09c35bf5ef11f4;hb=9450ab2ba8d720bd9f73bccc0af2e2b5a2c2aaf1;hp=5d2b624e00244885bfeaaf7938fa54fdec230240;hpb=abeb9d7897510533ce3a0a9515cac16db5bed834;p=platform%2Fkernel%2Fu-boot.git

diff --git a/drivers/watchdog/mpc8xx_wdt.c b/drivers/watchdog/mpc8xx_wdt.c
index 5d2b624..c24c2a9 100644
--- a/drivers/watchdog/mpc8xx_wdt.c
+++ b/drivers/watchdog/mpc8xx_wdt.c
@@ -1,10 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2017 CS Systemes d'Information
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
+#include <dm.h>
+#include <wdt.h>
 #include <mpc8xx.h>
 #include <asm/cpm_8xx.h>
 #include <asm/io.h>
@@ -17,3 +18,52 @@ void hw_watchdog_reset(void)
 	out_be16(&immap->im_siu_conf.sc_swsr, 0xaa39);	/* write magic2 */
 }
 
+#ifdef CONFIG_WDT_MPC8xx
+static int mpc8xx_wdt_start(struct udevice *dev, u64 timeout, ulong flags)
+{
+	immap_t __iomem *immap = (immap_t __iomem *)CONFIG_SYS_IMMR;
+
+	out_be32(&immap->im_siu_conf.sc_sypcr, CONFIG_SYS_SYPCR);
+
+	if (!(in_be32(&immap->im_siu_conf.sc_sypcr) & SYPCR_SWE))
+		return -EBUSY;
+	return 0;
+
+}
+
+static int mpc8xx_wdt_stop(struct udevice *dev)
+{
+	immap_t __iomem *immap = (immap_t __iomem *)CONFIG_SYS_IMMR;
+
+	out_be32(&immap->im_siu_conf.sc_sypcr, CONFIG_SYS_SYPCR & ~SYPCR_SWE);
+
+	if (in_be32(&immap->im_siu_conf.sc_sypcr) & SYPCR_SWE)
+		return -EBUSY;
+	return 0;
+}
+
+static int mpc8xx_wdt_reset(struct udevice *dev)
+{
+	hw_watchdog_reset();
+
+	return 0;
+}
+
+static const struct wdt_ops mpc8xx_wdt_ops = {
+	.start = mpc8xx_wdt_start,
+	.reset = mpc8xx_wdt_reset,
+	.stop = mpc8xx_wdt_stop,
+};
+
+static const struct udevice_id mpc8xx_wdt_ids[] = {
+	{ .compatible = "fsl,pq1-wdt" },
+	{}
+};
+
+U_BOOT_DRIVER(wdt_mpc8xx) = {
+	.name = "wdt_mpc8xx",
+	.id = UCLASS_WDT,
+	.of_match = mpc8xx_wdt_ids,
+	.ops = &mpc8xx_wdt_ops,
+};
+#endif /* CONFIG_WDT_MPC8xx */